Beat the margarine, sugars, egg and vanilla in a large bowl until well mixed. Stir in the baking mix. Stir in food color (if desired), white chocolate chunks and lime zest.

Drop the dough by rounded teaspoonfuls onto an ungreased baking sheet. Bake 8 to 10 minutes or until set but not brown. Let cool 1 minute before removing from the baking sheet. Cool on a wire rack. Makes about 3 ½ dozen cookies.